how do i grep recursively

Question

how do i recursively grep all directories and subdirectories ?

find . | xargs grep "texthere" *

Answer 1

grep -r "texthere" .

Answer 2

Also:

find ./ -type f | xargs grep "foo"

but grep -r is a better answer.

Answer 3

Or install ack, if you want a much faster way and are doing this a lot.